diff --git a/arch/arm/configs/efm32_defconfig b/arch/arm/configs/efm32_defconfig
index c4c17e3a8e1aa32694b6b8950b67b2daba5b50d5..f2426104ee2bcfc3448ea71d5dde0015c44ad280 100644
--- a/arch/arm/configs/efm32_defconfig
+++ b/arch/arm/configs/efm32_defconfig
@@ -85,7 +85,6 @@ CONFIG_GPIO_SYSFS=y
 # CONFIG_USB_SUPPORT is not set
 CONFIG_MMC=y
 CONFIG_MMC_SPI=y
-# CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXT2_FS=y
 # CONFIG_FILE_LOCKING is not set
 # CONFIG_DNOTIFY is not set
diff --git a/arch/arm/configs/lpc18xx_defconfig b/arch/arm/configs/lpc18xx_defconfig
index caf7b524894337b797aae14c262e2f0915b7ea7e..d4320a7e433f440b03e1f0717ef79f0446a35f05 100644
--- a/arch/arm/configs/lpc18xx_defconfig
+++ b/arch/arm/configs/lpc18xx_defconfig
@@ -22,6 +22,7 @@ CONFIG_EMBEDDED=y
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
 # CONFIG_MMU is not set
+CONFIG_ARM_SINGLE_ARMV7M=y
 CONFIG_ARCH_LPC18XX=y
 CONFIG_SET_MEM_PARAM=y
 CONFIG_DRAM_BASE=0x28000000
diff --git a/arch/arm/configs/stm32_defconfig b/arch/arm/configs/stm32_defconfig
index fab9cf9bff0200483ce9fe6c4ba42785d499be66..4725fab562cb3de63af3ac24c409a18542283efc 100644
--- a/arch/arm/configs/stm32_defconfig
+++ b/arch/arm/configs/stm32_defconfig
@@ -18,6 +18,7 @@ CONFIG_EMBEDDED=y
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
 # CONFIG_MMU is not set
+CONFIG_ARM_SINGLE_ARMV7M=y
 CONFIG_ARCH_STM32=y
 CONFIG_SET_MEM_PARAM=y
 CONFIG_DRAM_BASE=0x90000000